Improvement in Ventilators and Protectors for Roofs.
Description:
Patent for improvements in ventilators and protectors for roofs relating to "a ventilating combing or ridging for roofs of houses" (lines-15-16) including illustrations and instructions.
Date:
October 24, 1876
Creator:
Brock, Ernst Moritz
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department